After the pioneering theoretical work of [1]} many other early works advanced and improved upon this subject [2]}, [3]}, [4]} [5]}. However, these results focused on what is termed “primary breakup”, i.e. the transition of the jet from a cylindrical geometry to the formation of the first detached droplets and “ligaments”. This breakup has been found to depend on numerous parameters, and a characterization of the breakup mechanism, based on the dominant physical forces acting on it has been achieved with some success. This was summarized in what is called the “breakup regimes” and it can be described broadly in terms of two parameters: the jet's Reynolds and the Weber numbers. Another classification which separated these breakup regimes was based on the jet's speed and the “Z length” or the length of the “continuous” part of the jet. Four main breakup regimes have been identified: (i) the capillary or Rayleigh regime; (ii) the first wind-induced regime; (iii) the second wind-induced regime; and (iv) the atomization regime. Some review articles on the topic include [6]}, [7]}, [8]}, [9]}, [10]}.
